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68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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// ---------------------------------------------------------------------------
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// FM sound generator common timer module
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// Copyright (C) cisc 1998, 2000.
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// ---------------------------------------------------------------------------
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// $Id: fmtimer.h,v 1.2 2003/04/22 13:12:53 cisc Exp $
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#ifndef FM_TIMER_H
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#define FM_TIMER_H
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#include "fmgen_types.h"
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// ---------------------------------------------------------------------------
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namespace FM
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{
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struct TimerData {
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uint8 status;
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uint8 regtc;
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uint8 regta[2];
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int32 timera, timera_count;
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int32 timerb, timerb_count;
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int32 timer_step;
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};
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class Timer
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{
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public:
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void Reset();
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bool Count(int32 us);
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int32 GetNextEvent();
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void DataSave(struct TimerData* data);
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void DataLoad(struct TimerData* data);
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protected:
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virtual void SetStatus(uint bit) = 0;
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virtual void ResetStatus(uint bit) = 0;
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void SetTimerBase(uint clock);
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void SetTimerA(uint addr, uint data);
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void SetTimerB(uint data);
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void SetTimerControl(uint data);
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uint8 status;
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uint8 regtc;
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private:
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virtual void TimerA() {}
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uint8 regta[2];
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int32 timera, timera_count;
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int32 timerb, timerb_count;
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int32 timer_step;
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};
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// ---------------------------------------------------------------------------
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// <09><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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//
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inline void Timer::Reset()
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{
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timera_count = 0;
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timerb_count = 0;
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}
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} // namespace FM
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#endif // FM_TIMER_H
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